1. spark gap the gap between two high-potential terminals
  2. spark coil an induction coil used to create sparks
  3. sporocarp specialized leaf branch in certain aquatic ferns that encloses the sori or clusters of sporangia
  4. porkchop chop cut from a hog
  5. sparge pipe a horizontal pipe having fine holes drilled throughout its length so as to deliver a spray of water
  6. sparingly to a meager degree or in a meager manner
  7. sparkle emit or produce sparks
  8. sparing avoiding waste
  9. spark off put in motion or move to act
  10. sparkly having brief brilliant points or flashes of light
  11. sparkler firework that burns slowly and throws out a shower of sparks
  12. spark a small fragment of a burning substance
  13. sparge scatter with liquid; wet lightly
  14. sparker a wire net to stop sparks from an open fireplace or smokestack
  15. spark chamber an instrument that detects ionizing radiation from elementary particles
  16. Spark Scottish writer of satirical novels (born in 1918)
  17. spirograph a measuring instrument for recording the depth and rapidity of breathing movements
  18. sparking plug electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
  19. sparring making the motions of attack and defense with the fists and arms; a part of training for a boxer
  20. supper club usually a small luxurious nightclub